soon have you got one of these?
www.babykind.co.uk/econappiorder.htm
look same as BG but patterns
also i have just sorted out my nappy stash and found a load of these
www.mothercare.com/Mothercare-Smart-Nappy-reusable-nappy/dp/B000TUW3H4/sr=1-6/qid=1238778712/ref=sr_ 1_6/280-8813377-9927047?%5Fencoding=UTF8&m=A2LBKNDJ2KZUGQ&n=61630031&mcb=core
the newborn size is tiny, and its cotton one side and microfibre the other. i put one in a BG and it its perfect.
have a look at one when you are next in mothercare, at 2 for a fiver thats a cheap soultion to what to put in a BG, and as they are more then just microfibre i reckon would do a while absorbancy wise.
the tots bots will take quite a few washes to get to full absorbancy, mine must have been about 5, just booster them up for now.
mind you even now i put one easy peasy hemp insert in mine, but i find that does me 4 hours easy.
dont forget they are only bamboo.. so dont expect miracles lol